Why do we have time zones?: The Earth turns, so the sun is high at different times in different places
How many degrees of longitude is one time zone, roughly?: 15 degrees
How many hours does the Earth take to turn once?: 24 hours
What line is zero degrees longitude?: The Prime Meridian
Which city does the Prime Meridian run through?: Greenwich, London (England)
What does UTC stand for?: Coordinated Universal Time
What is GMT?: Greenwich Mean Time, the time at the Prime Meridian
Which line is roughly where one calendar day changes to the next?: The International Date Line
Where is the International Date Line in the Earth?: About 180 degrees longitude, in the Pacific Ocean
If you cross the Date Line going west, what happens to the date?: It moves forward one day
If you cross the Date Line going east, what happens to the date?: It moves back one day
Which way does the sun seem to move across the sky?: East to west
If it is noon in New York, is it earlier or later in Los Angeles?: Earlier, because Los Angeles is further west (9 a.m.)
Name the four main U.S. time zones in the lower 48 states.: Eastern, Central, Mountain and Pacific
Which U.S. time zone is farthest east in the lower 48?: Eastern Time
Which U.S. time zone is farthest west in the lower 48?: Pacific Time
Which zone is New York City in?: Eastern Time
Which zone is Chicago in?: Central Time
Which zone is Denver in?: Mountain Time
Which zone is Los Angeles in?: Pacific Time
Which zone is Alaska mostly in?: Alaska Time
Which zone is Hawaii in?: Hawaii–Aleutian Time
How many hours apart are Eastern and Pacific Time?: Three hours
What is Daylight Saving Time?: Moving clocks ahead an hour in spring and back in fall to use more daylight
Which U.S. state mostly does not use daylight saving time?: Arizona (except the Navajo Nation)
What does a.m. mean?: Ante meridiem: before noon
What does p.m. mean?: Post meridiem: after noon
What time zone is London in during winter?: GMT (UTC+0)
Which time zone is Tokyo, Japan in?: Japan Standard Time (UTC+9)
Which time zone is India in?: India Standard Time (UTC+5:30)
Which time zone is Beijing, China in?: China Standard Time (UTC+8)
Which country has the most time zones, counting overseas territories?: France
Which large country spans eleven time zones?: Russia
Which zone is Paris in during winter?: Central European Time (UTC+1)
Which zone is Sydney, Australia on the east coast in?: Australian Eastern Standard Time (UTC+10)
What does it mean when a place is 'ahead' of us in time zones?: It is further east, and its clock shows a later time
At which time is the sun directly overhead, on average?: Around noon (solar noon)

Free flashcards from Peabody at peabody.kids/flashcards/geo-time-zones